Flora of North America species comparison

usually well branched from base, 8–50 cm, flowering only distally.

usually well branched from base, 3–30 cm, usually flowering proximally and distally.

cauline, with lower ones clustered near base, (0.7–)2–8(–10) × 0.1–2.5 cm;

petiole 0.1–3.5 cm;

blade very narrowly elliptic to narrowly elliptic, margins entire or sparsely denticulate.

cauline, mostly clustered near base, reduced distally, 0.5–2.5 × 0.3–1.5 cm;

petiole 0.5–2 cm;

blade oblanceolate or narrowly oblanceolate, margins entire or sparsely denticulate.

nodding.

erect.

opening at sunset;

floral tube 1.5–3 mm, villous in proximal 1/2 inside;

sepals 1.5–2.5 mm;

petals white, fading pinkish, 1.8–3 mm; episepalous filaments 0.7–1.5 mm, epipetalous filaments slightly shorter, anthers 0.5–1.1 mm;

style 2.3–4.5 mm, villous proximally, stigma 0.7–1 mm diam., surrounded by anthers at anthesis.

opening at sunset;

floral tube 0.5–1.9 mm, strigillose in proximal 1/2 inside;

sepals 0.8–1.8 mm;

petals white, fading pinkish, 0.8–1.3 mm;

filaments 0.3–1.3 mm, epipetalous filaments shorter than episepalous, sometimes apparently abortive, anthers 0.5–0.8 mm;

style 1.2–3.2 mm, sparsely short-villous near base, stigma 0.5–0.6 mm diam., surrounded by anthers at anthesis.

narrowly cylindrical throughout, spreading, straight, terete, 35–60 × 0.7–1 mm, regularly but tardily dehiscent.

cylindrical and thickened proximally, spreading, contorted, subterete, 10–25 × 0.8–1.2 mm, regularly but tardily dehiscent.

monomorphic, gray, 0.9–1 × 0.3–0.4 mm, finely reticulate.

monomorphic, gray, 1.1–1.2 × 0.4 mm, finely reticulate.

= 14.

= 14.